OK, that’s what I thought, but with everyone saying how pricey they were, I was thinking maybe I was wrong.
So if we use the sauna for 4 hours, 4 times a week (which is probably about average), assuming it’s on full-time for the first hour and half-time for the following 3 hours, that’s about $6/week. Not bad considering how much we like it.
As noted above, being in a colder environment will reduce energy use, since less heat will leak into the fridge through the insulated walls. Another important question is whether you were actually using the fridge during this time; a lot of heat can enter the fridge when the door is opened, and the fridge has to do work to remove it. In other words, a fridge sitting in a 45°F garage and never being opened is going to use a lot less energy than a fridge that’s being used in a 70°F kitchen.
It’s a beer fridge. It gets opened, trust me. 
50 watts? that is about 0.4 amps. I would be willing to bet that your evaporator fan consumes around 0.4 amps all by it self. Now add in the condencer fan and the compressor. I would believe that your reading of 50 watts is only when the compressor is not running.
Look at the name plate data sheet, it should have the amp draw so you can calculate the KW. Run time will depend on how often and how long the door is opened.
It is the average use over hundreds of hours. The refrigerator uses different amounts of electricity at different times. The levels I have been able to measure are: none, fan low(?), fan high(?), compressor on, defrost on. Oddly, the self-defrost cycle requires more power than the compressor.
Regarding the (?) on the fan speeds, I am not sure if there are two speeds, two fans, or some combination. Sometimes when the fan is on it reads about 10 watts, and sometimes it reads a higher value.
I did some calculations and some guess. If it consumes 5 amps when running or 600 watts. to average out to 50 watts it would be running only 2 hours a day. That is a very short duty cycle.
It never uses near that much power at one time.
A quick search on the Sears web site tells me that my experience is outstandingly normal. If you look at the energy guide ratings for the new units, most of them fall into the range of 42-66 Watts on average.
Be thankful. You must live where there is a lot of cheap hydroelectricity. Here in Massachusetts, my electric bill typically runs about $0.16 per KwH, about twice what you pay. My refrigerator averages 140 watts which works out to about $16 per month or $200 per year. It’s 22 years old and I keep wondering how long it would take to recover the cost of a newer, more-efficient refrigerator.
new units will have a sticker with amount of power used and give a usage cost example.
with an accurate amount that your fridge uses now then you can calculate a payback period. also utilities might also have a payment or credit for turning in a working old unit to them which makes the replacement even better.